<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item,index) in arr" :key="item.id">
          <td>{{index+1}}</td>
          <td>{{item.name}}</td>
          <td>{{item.age}}</td>
          <td>{{item.sex}}</td>
          <td>
            <button @click="del(item.id)">删除</button>
            <button @click="update">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
  <script src="./vue-2.7.14.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        arr: [
          {
            id: new Date,
            name: '李重阳',
            age: '12',
            sex: '男',
          },
          {
            id: new Date,
            name: '杨越',
            age: '19',
            sex: '男',
          },
        ],
        id: new Date(),
        name: '',
        age: 0,
        sex: '男'
      },
      methods: {
        del(id) {
          this.arr = this.arr.filter(item => item.id !== id)
        },
        add() {
          if (!this.name || !this.age) {
            return alert('不能输入空值')
            this.name = this.age = ''
          }
          this.arr.push({
            id: new Date(),
            name: this.name,
            age: this.age,
            sex: this.sex
          })
          this.name = this.age = ''
        },
        update() {
          this.arr.push({
            id: new Date(),
            name: this.name,
            age: this.age,
            sex: this.sex
          })
        }
      }
    })
  </script>
</body>

</html>